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Diffstat (limited to 'lorrycontroller/proxy.py')
-rw-r--r-- | lorrycontroller/proxy.py | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/lorrycontroller/proxy.py b/lorrycontroller/proxy.py new file mode 100644 index 0000000..44749c9 --- /dev/null +++ b/lorrycontroller/proxy.py @@ -0,0 +1,51 @@ +# Copyright (C) 2014 Codethink Limited +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, write to the Free Software Foundation, Inc., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + + +import json +import os +import urllib +import urllib2 + + +def setup_proxy(config_filename): + """Tell urllib2 to use a proxy for http action by lorry-controller. + + Load the proxy information from the JSON file given by proxy_def, then + set urllib2's url opener to open urls via an authenticated proxy. + + """ + + if not os.path.exists(config_filename): + return + + with open(config_filename, 'r') as f: + proxy = json.load(f) + + # set the required environment variables + hostname = urllib.quote(proxy['hostname']) + user = '%s:%s' % (proxy['username'], proxy['password']) + url = '%s:%s' % (hostname, proxy['port']) + os.environ['http_proxy'] = 'http://%s@%s' % (user, url) + os.environ['https_proxy'] = 'https://%s@%s' % (user, url) + + # create a ProxyHandler + proxies = {'http_proxy': 'http://%s@%s' % (user, url), + 'https_proxy': 'https://%s@%s' % (user, url)} + proxy_handler = urllib2.ProxyHandler(proxies) + + # install an opener to use the proxy + opener = urllib2.build_opener(proxy_handler) + urllib2.install_opener(opener) |